Intelligence is the readiness of a human's brain to create cognitive fauceirs. This is compatible with the essence of intelligence tests that mainly test the capability to swiftly find solutions to problems by abstraction and generalization. But the fauceir definition extends the narrow dictionary definition to all kinds of cognitive fauceirs.Solutions to problems may be found in different domains of cognitive function:

visual/graphical

verbal

mathematical

social

emotional

and some others.

There is lot of confusion about the term intelligence not only among laypeople but even among experts. The different concepts can be grouped as follows:

Intelligence is considered as the sum of all capabilities to accumulate memory

Intelligence is considered as the inheritable part of capabilities to accumulate memory

Finally some scientists want to pinpoint intelligence as a specific constellation of alleles

The first is best tested in an exam that asks for the available knowledge whereas the last could be tested by molecular genetic methods if the genes defining intelligence were ever detected. For those in between different types of intelligent test have been developed. None appears satisfactory as all these tests fail to exactly predict the capability to perform in life.